/**  
* Copyright (c) 2009, Noel Lynch All rights reserved. Redistribution and use  
* in source and binary forms, with or without modification, are permitted  
* provided that the following conditions are met: Redistributions of source  
* code must retain the above copyright notice, this list of conditions and the  
* following disclaimer. Redistributions in binary form must reproduce the above  
* copyright notice, this list of conditions and the following disclaimer in the  
* documentation and/or other materials provided with the distribution. Neither  
* the name of Noel Lynch nor the names of contributors may be used to  
* endorse or promote products derived from this software without specific prior  
* written permission. THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 
* CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT  
* NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A  
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR  
* CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,  
* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,  
* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;  
* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,  
* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR  
* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF  
* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.  
*/
// created by noellynch
// Sep 29, 2009

package com.sceneworker.editors.texturepainter.brushgenerator;

import java.awt.geom.Point2D;

import com.myjavautils.math.MathUtils;

public class BrushSpectrumCalculator implements IQuadraticBrushSpectrum {
	
	private		Point2D		mcl_ctrl = null;
	private		Point2D		mcl_ptA = null;
	private		Point2D		mcl_ptB = null;
	
	private		int				mi_samples = 10;
	
	public	BrushSpectrumCalculator() {
		mcl_ptA = new Point2D.Double(0, 0);
		mcl_ptB = new Point2D.Double(100, 100);
		mcl_ctrl = new Point2D.Double(50, 50);
	}

	public int getSamples() {
		return mi_samples;
	}

	public double sampleAtX(double f_x) {
		if(mcl_ptA == null) {
			return 0;
		}
		
		double	lf_d = MathUtils.quadraticBezierCurve(mcl_ptA.getX(), mcl_ctrl.getX(), mcl_ptB.getX(), f_x);
		double	lf_total = mcl_ptB.getX() - mcl_ptA.getX();
		return (lf_d - mcl_ptA.getX()) / lf_total;
	}

	public void setSamples(int i_s) {
		mi_samples = i_s;
	}
	
	public	Point2D		getControlPoint() {
		return mcl_ctrl;
	}

}
